Jack



.' 1.. C. SEYMOUR AND A. McKE LLA R more,

. APPLICATION FILED- MAY], 1920.

Pateqfd lgn 28, 1921.

' INVENTORS,

Y ATTORNEYS...

' use of anti-friction elements,

her, main standard and base,

" Fig. 4

UNITED STATES PATENT OFFICE;

JONATHAN o. SEYMOUR AND ANGUS MQKEL R, or SALT LAKE CITY, UTAH. a

JACK.

provements in Jacks, of which the following is a specification.

This invention relates in general to jacks, and in particular to jacks for use wlth automobiles.

One object of the invention is to prov de a light weight, but powerful jack, in which friction between the load engaging parts and thel'base member or adju'stablememher is largely eliminated. The details of construction which make this result possible include particular features involving the such as ball or roller bearings, and the particular shape and relative position of the assembled parts.

Anotherobj'ect of the invention is to provide, in combination with the foregoing features, aknock-down jack which maybe sufiiciently powerful for any work and which is peculiarly adapted for use with automobile tool kits. The details described hereinafter provide for the particular configuration and mounting of the parts which complete'a powerful jack, which may be quickly collapsed for packing in the limited storage space of an automobile tool box.

' Details of the above mentioned features 'areide'scribed in the following specification and claims and illustrated in the accompanying drawings, in which- Figure l is a vertical sectional view of the jack showing the hub member screw threaded to the main standard, showing the.

balls in theraceway in the hub, and illustrating the detachable work Supporting member mounted on the balls, and the detachable wheel mounted on the hub for turning the same;

Fig. 2 is a top plan view, partly broken away, showing the rectangular central open- 'ing which is adapted to engage the rectangular. portion of the hub periphery; Fig. 3 is a top plan Supporting member and operating wheel re moved;

supporting member removed from the main portion of the jack.

Referring in" detail to the drawings,

view of the hub memwith the work is a front elevation of the work f I I and engage the rectangular contour 13- of Specification of Letters Patent. Patented J 28; 1921 7 Application filed May 7, 1920. Serial No. 379,503. I

indicates the base of the jack having, a central opening therein for the reception of an member 4 is a raceway 6 for the reception 4 of anti-friction means indicated by ball bearings 7. Theseballs, as illustrated, rest on a lower supplemental raceway 7 and immediately above the balls is an upper re- I taining member having a groove in itsun- 'der surface, which is indicated by 8. This member 8 has a loose fit with the hub memher 4 and the top surface is substantially heads project over the edge of the retaining'member S to prevent loss of theballs 7. Immediately above the retaining member 8 and encircling the upper end of the stand ard 2 is a tubularwork supporting member 10, the lower endof whichrests on the member 8 and thereby applies theflweight of the work directly to the anti-friction level with the surface of the hub member,

Screws 9, having extending heads, are 56-- cured to the hub member 4, so that their units 7 in the raceway 6. At the top of the detachable work supporting member 10 is a work contact or positioning member 11, which is secured to the member 10 by means of a set screw 12 and which isillustrated as resting on a shoulder 10, formed at the upper end of the member 10 to rece ve the weight of the load. If desired, the part 11 and the part 10 could be formed inv one piece, in which case the shoulder 10 would be dispensed with, and the set screw 12 unnec Sary. g

In order to provide for the quick detachable. and knock-down features, so that'the jack may be sufficiently compact to rea ilily the peripheryof the hub member 4.

I The construction described has made it 'be packed in an automobile tool-box, and

I *it is'shown as rectangulan. Lever means 1 possible to produce a jack in which there is remarkably little friction due to the locationandfluse'of the anti-friction means. It has been found that unusuallylittle power is required because of the cooperation of r the anti-friction means with the tremendous force which may be had by means ofthe use of screw threads between the adjustable hub member and the main supporting standard.

The knock-downfeatures have proved of considerable value because it is thus possible 'to remove the lever means from the hub portion andto pack the jack in very small space, the wheel being relatively thu: and

lying flat against the side wall of the tool box of the automobilein which it is stored.

at W la m s 1. A jack comprising a base, a pr1mary supporting stand. thereon, a movable mem ber adjustably mounted on said. standard andhavin an annular raceway, anti-friction units ior'said raceway, power applying means adapted'to'cooperate with said movable-member, and a supplemental standard mounted for cooperation with said anti-fric- 7 tion units and freely rotatable thereon and extending. directly therefrom as spacing member to engage work.

rotatable thereon extending directly therefrom as a rigid spacing member to engage work, said supplemental standard being free to rotate with respect to said power applying means. i

3. A jack comprising a base, aprimary supporting standard thereon, a movable member adjustably mounted on said standard and having an annular raceway formed on its upper side, anti-friction units for said raceway, and a Supplemental ,standard adapted to engage work and having a tubu lar portion encircling said primary stand ard and with the lower end thereof directly above and supportedby said anti-fr ction 7 units and extending directly therefrom as a rigid spacing member to engage work.

a base, a primary 4. A jack comprisin screw-threaded supporting standard having its lower endfixed in said base, a screwthreaded movable memberadjustably mount 4 ed on saidstandard and in screw-threaded engagement therewith and having aniannularf raceway formed on its upper side, antifriction units for, said raceway, a cover memberfor said anti-friction units restingi on the same, and. a supplemental standard rests 9 ai e e m er rd ex endin rectly as a rigid spacing member to engage Work. V r

' 5. A jack comprising a base, a primary screw-threaded supporting standard having its lower end fixed in said base, a screwthreaded movable member adjustably mount ed on said standard and in screwthreaded engagement therewith and having an annular racewayformed on its upper side, antifriction units for said raceway, a cover memher for said. antifriction units resting on thesame, releasable seeuringm'eans for retaining said cover member onsaid anti-fric- 'tion units, and. a supplemental standard resting on said cover member andextending directly as a rigid spacing member to engage work. I j V 6. A jack comprising a base, a primary supporting standard thereon, a movable member adjustably mounted on said stand a d n a ns n an li arr cew r f fl in its upper surface, anti-friction units for said raceway, cover member said anti' frict'ion units resting onthe same. and

having its upper surface substantially level with the upper surface of said movable member immediately adjacent said raceway.

7. A knock-down jack comprising a base,

a standard thereon, an adjustable member on.

id anda d, qr'k ePP 't ns" mai mounted in cooperation w th i said 1 adjustable 'member, and work positioning.

means'on said worksupporting. means' ineluding a contact membeifito engage work, and securing means to, fasten said con t act member on said work supporting means and in any predetermined position;

a screw threadedstandard mounted thereon, anadjustable hub member serew threaded to said standard and having, an irregular outer, periphery, detachablepower applying means having an opening, the edges of which 8. Aknock-down jack eomprising a base,

latter are adapted. to engage and fitthe ir-' regular periphery of hub I iieI njberQand work supporting means mounted foi co 'iper'- at on with said hub member. Y f 14 9. knock downjack comprising a base,

I a screw threaded standard mountedlthereon,

a 1 15 to said standard and having an lrregular an adjustable hub member screw threaded outer periphery, a detachablepowerapplymg wheel having an opening, theledges of whi h latter areadaptedto engage and fit i the irregular periphery ofsaidhub member,

and work supporting means niountedffor cooperation with said hub member,

1.0. l'znock downjaek comprisinga-base, i a screw threadedstandard ineunted, thereon,

an adjustable member er'ew; threaded to said standard and having anirregular 1 Per hery, deta habl R wen applying I le mea adaJPti $9 gs afie d? 1 1 member, and having apo'rtionf adapted" to cooperate with acooperating p'ai tqrs aid hub member to prevent relative lateral or circumferential movement of these parts, and

work supporting means mounted for cooperation with said hub member. 7

11. A knock-down jack comprising a base, a screw threaded standard mounted thereon, an adjustable hub member screw threaded to said standard and having an annular raceway formed in its upper surface, and an irregular lateral periphery, anti-fr'i'ction units in said raceway, a cover member for said anti-friction units resting on the same, work s11 ortin means restin on said cover men ber, and detachable power applying lever means adapted to engage said hub member and having a part adapted to cooperate with In testimony whereof we affix our signa- 20 tures.

JONATHAN G. SEYMOUR. ANGUS McKELLAR. 

